This sits outside the game itself, which is exactly why it is hard to find a straight answer about it.
Short answer
Treat it as supplementary. Enjoyable on its own, and richer if you have played first.
Assets circulated online are often ripped rather than released, which affects what you can legally do with them. Licensed soundtracks are the most likely part to be missing from a re-release. Half the pages on this topic were written for a build that no longer exists, which is why they stop matching what you see.
What is fan-made
Official art books contain material that never appears in the game itself. Adaptations take liberties, and the interesting ones take them deliberately. Patch notes move numbers around constantly; the shape of the answer holds even when a specific value shifts. Fan work is frequently better than official work and is not the same thing.
Canon status is decided by the developers rather than by the adaptation's writers. Most of the disagreement you will find online is two people describing different builds. Release order and chronological order are different, and both have their advocates.
Where to find it legitimately
Everything below is framed around the current state of League of Legends rather than a launch-week impression. If you are coming to this after a long break, the terminology has probably moved on. Treat anything stated without a version number as provisional.
- Expect licensed music to be missing from re-releases.
- Buy from the publisher's own store where one exists.
- If a menu path does not exist for you, your build is older or newer than the one described.
- Play first if you mind spoilers — adaptations rarely respect them.
- Look for an official assets page before downloading anything.
- Expect one number in every guide to be out of date; the method is what matters.
What exists officially
Anything that behaves differently on console than on PC is flagged where it matters. It helps to understand why a step exists, because then you can adapt it when your situation is slightly different. If your result differs from what is described here, note what is different first rather than starting over. The awkward part is rarely the step itself, it is knowing which step comes first.
None of this needs a paid tool, a third-party launcher or an account on a site you have never heard of. What follows assumes you are on a current install and have not modified it. There is no hidden trick here that the game is keeping from you.
Where it fits with the game
Where something depends on your platform or region, that is called out rather than glossed over. The community wisdom on this is roughly half right, and the half that is wrong costs the most time. League of Legends is not shy about hiding useful information two menus deep, so some of this is simply knowing where to look.
A single check up front replaces a lot of guessing later. There is usually a fast way and a reliable way, and it is worth knowing which one you are choosing. The short version is near the top on purpose; the reasoning is there if you want to know why.
Whether it is worth your time
If a step reads as obvious, do it anyway — the obvious ones are the ones people skip and then wonder about. Where two approaches both work, the one with fewer moving parts is the one to keep. Do the cheap check before the expensive one — that ordering alone saves most of the frustration.
Where people go wrong
- Copying a setup wholesale from a streamer without understanding what each part does.
- Downloading a helper tool for something the game already does in its own menu.
- Ignoring the platform-specific note and then wondering why the steps do not line up.
League FAQ
Is it any good?
The reception is mixed and depends heavily on what you wanted from it. The section above sets that expectation honestly.
Is it canon?
Where the developers have said so, yes. Adaptations produced under licence are frequently their own continuity.
Is this still accurate after the latest League of Legends update?
The method is; individual numbers may not be. If a value on your screen differs, trust the screen and keep the sequence.
How long does this take?
Minutes if it goes cleanly, an evening if you hit the edge case in the caveats list. Neither is unusual.
Anything that shifts with the next League of Legends update will show up as a changed number, not a changed approach.